Loose pulley or wheel.



No. 825,813. PATENTED JULY 10, 1906. J; B. ETTINGER. LOOSE PULLEY OR WHEEL.

APPLICATION FILED T15R28. 1905.

n vrrnn srarns PATENT orrron LOOSE PULLEY 0R WHEEL.

Specification of Letters Patent.

Patented July 10, 1906.

Application filed February 28, 1905. Serial N0u 2 27.689.

To a. whom it natty concern:

Be it known that I, JOEL B. ETTINGER, a citizen of the United States, residing in Philadelphia, Pennsylvania, have invented certain Improvements in Loose Pulleys or lVheels, of which the following is a specification.

The main object of my invention is to reduce the friction between a shaft or axle and a loose pulley or wheel mounted. thereon and a further object of the invention is to provide means for readily taking up the lost motion occasioned by wear.

Referring to the accompanying drawings, Figure 1 is a side view of my improved loose pulley. Fig. 2 is a sectional view on the line 2 2, Fig. 1. Fig. 3 is a transverse sectional view on the line 3 3, Fig. 2. Fig. 4 is an enlarged sectional view on the line 4 4, Fig. 1. Fig. 5 is a perspective view of one of the bearings, and Figs. 6, 7, and 8 are views of modified forms of details of the invention.

I have illustrated my invention in connection with a loose pulley; but it will be understood that it can be applied to a driven wheel which is loosely mounted on an axle without departing from my invention.

A is the shaft. B is a pulleyloosely mounted on the shaft. The pulley has a rim B and two side plates B 13", which are attached to the rim in the present instance by screwrods 6. These side plates have three arms in the present instance, leaving three spaces, so that access can be readily had to adjusting screws described hereinafter. The shape of the side plates will vary according to the size and design of the pulley.

Mounted in circular openings in the side plate are boxes e for the spindles E, three in the present instance, and loosely mounted on the spindles are wheels D, as shown in Fig. 2. There are two Wheels on each spindle, while in Fig. 6 I have shown one Wheel on each spindle. depend upon the width of the pulley.

The bearings in the boxes 6 for the spindles E are eccentric to the eriphery, so that on turning the boxes the w eels D can be moved toward or from the shaft A. By this means lost motion can be readily taken up.

I make two small holes in one end of each box, so that a forked tool can be used to turn the bearings, and, as shown in Figs. 2 and 4, I secure the bearings to the side plates by set-screws e.

I preferably make an annular V-shaped The number of wheels will groove 6 in each box and taper the end of the screw e, so that when the screw is in position it will prevent the box moving longitudinally in its bearings. preventing this movement may be resorted to without departing from my invention. For instance, as shown in Fig. 7, the bearing for each box may be made in two parts, with a cap I) and the box 6, provided with flanges e, 011 each side of the bearings, and in some instances the box may be dispensed with entirely and the shaft may have on each end spindles E, mounted eccentrically in respect to the shaft, and these eccentric spindles may be mounted directly in openings in the side plates and secured in position by means of set-screws, as shown in F ig. 8.

It will be seen that the wheels D do not contact with the rim of the pulley, but are mounted on the spindles E, which are carrier'l by the side plates of the pulley, and that the pulley itself does not bear upon the shaft. Consesequently the wheels freely rotate on their spindles E and travel at a speed differing from the travel of the pulley, so that while the pulley or the shaft is traveling at a high rate of speed there will be a comparatively small amount of friction, as the wheels only have a peripheral bearing upon the shaft.

In same instances the wheels D may be attached to the spindles E and the spindles revolve freely in the boxes 6, but I prefer to mount the wheels loosely upon the spindles and the spindles loosely in the boxes.

I claim as my invention- 1. The combination of a shaft, a pulley, a series of spindles carried by the pulley, two antifi'iction-wheels mounted on each spindle, said wheels being spaced apart and each being loose upon its spindle so that the wheels will rotate independently and each wheel having a peripheral bearing only upon the shaft, the pulley being free of the shaft, sub stantially as described.

2. The combination of a shaft, a pulley, eccentric bearings carried by the pulley, a series of spindles mounted in the bearings, wheels mounted on the spindles and having a peripheral bearing on the shaft, and means for holding the bearings in their adjusted positions, substantially as described.

3. The combination of a shaft, a pulley having a rim and end plates secured to the rim, three eccentric bearings mounted in each end plate and spaced an equal distance apart, spindles carried by the bearings, and

Other means for wheels mounted on the spindles and having a peripheral bearing upon the shaft, substantially as described.

4. The combination of a shaft, a pulley having end plates and a rim, means for securing the end plates to the rim, three spindles mounted in the end plates a given distance apart, a roller carried on each end of each spindle and having a peripheral bearing only on the shaft, the body of the pulley being free of the shaft, substantially as described.

5. The combination of a shaft, a pulley having a rim-section recessed at each edge,

side plates having arms resting in the recesses of the pulley, rods extending from one side plate to the other whereby the rim-section of the pulley is clamped to the side plates, said side plates being free of the shaft, adjustable boxes carried by the side plates, spindles mounted in said boxes, and antifrictionwheels carried by the spindles, said wheels having a peripheral bearing only upon the shaft, substantially as described.

6. The combination of a shaft, a pulley having a rim and side plates, openings in the side plates, a box mounted in each opening, spindles carried by the boxes, the bearingopemng in each box being eccentric to its pel riphery so that on turning the boxes the l spindles can bemoved toward and from the l center of the shaft, set-screws for securing each box in position, and antifriction-wheels carried by the spindles, said wheels arranged to bear only upon the shaft, substantially as described.

7. The combination of a shaft, a pulley, circular openingsin the side plates of the pulley, cylindrical boxes mounted in said openings, each box having a peripheral groove, a set-screw carried by the plates of the pulley and arranged to extend into the annular groove in the box so as to lock the box against l longitudinal movement and to hold the box in its adjusted position, eccentric bearings in the boxes, spindles mounted in the bearings, and antifriction-wheels carried by the spindles, said wheels having a peripheral bearing only upon the shaft, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

- JOEL B. ETTINGER.

Witnesses:

WILL. A. BARR, Jos. H. KLEIN. 

